I am using my iPhone 4s, fully updated with the latest ios and app update. i tried all restarts, deleting and redownloading. It still signs in with my other PSN account, but this one it has the blue bar with login and a back arrow across the top, similar to what another user has.

ATyR_Tabooo Solution i found out, go to Activision Assist on Facebook, like the page and write on the wall, a representative of activision will assist you. I wrote on their wall with my problem and within the hour a representative got in touch with me, had a one on one conversation, and we fixed both my deactivated forum account and my problem with logging into the call of duty app in no time. They were super nice and cooperative.